Limitation:
Apps on your child’s device that are not suitable for their age (either legally, or recommended) will be placed into the Parental Guidance space, which needs your explicit approval to open.
Currently, you cannot approve the use of a single app in the PG space: it is all-or-nothing.
Workaround:
The only workaround at the moment is to uninstall unwanted apps from your child’s device so that opening the PG space doesn’t grant access to undesired apps.
Target date for fix/update:
We plan to make the PG space work for specific apps at a time. This functionality has already been designed and we hope to implement it before the end of September, probably in v0.9.3.